Fig. 4From: Assessment of chiropractic care on strength, balance, and endurance in active-duty U.S. military personnel with low back pain: a protocol for a randomized controlled trialBalance test. Test performed with eyes open and with eyes closed. Pressure sensitive pads (a) are connected to a computer timer. Lifting the heel (b) removes the pressure, which starts the timer. Touching any pad with either foot stops the timer and ends the testBack to article page